US 6,718,627 B2 · Back-up plate up/down apparatus

Abstract

The present invention discloses a back-up plate up/down apparatus in which a back-up plate is ascended or descended without rocking, maintaining a parallel state. The back-up plate up/down apparatus includes a base plate; guide blocks installed with a constant distance to the base plate; a first driving cylinder installed between the guide blocks; fixed blocks installed with a constant distance to both ends of the base plate and having rotating shafts inserted to both ends thereof; rotating links, in which the rotating shaft is inserted to an end thereof and a connecting member is connected to the other end thereof; a second driving cylinder connected to the connecting members by means of a rod; holders fixed at rods of other connecting members slidably and for fixing the back-up plate; and sensors installed to the holders with a constant distance.

Claims9

Dependent claims

A back-up plate up/down apparatus for supporting a printed circuit board comprising:

a base plate;
a plurality of guide blocks installed on the base plate;
at least one first driving means installed between the guide blocks;
a plurality of fixing blocks installed on the base plate, wherein a rotating shaft is installed between each respective pair of the fixing blocks;
a plurality of rotating links, wherein a first end of each rotating link is coupled to a respective rotating shaft;
a plurality of connecting members and wherein a second end of each rotating link is coupled to a respective connecting member;
a second driving means comprising an extendable rod, wherein the extendable rod is connected to one of the connecting members;
a plurality of holders coupled to respective ones of the connecting members and configured to hold a back-up plate;
and
a plurality of sensors configured to sense movement of a backup plate held by the holders.

7 more elements

Dependencies are inferred from the claim text.

Back-up plate up/down apparatus

Life of this patent

Back-up plate up/down apparatus

Life of this patent

Abstract

Claims9